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From: | Eric Blake |
Subject: | Re: [Qemu-devel] [PATCH v2 2/1] libqtest: add more exit status checks |
Date: | Thu, 24 May 2018 11:00:19 -0500 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 |
On 05/24/2018 10:52 AM, Eric Blake wrote:
Also, since waitpid() can only return either s->qemu_pid or -1 as we aren't using WNOHANG, it may also be worth asserting that if pid == -1, we either have EAGAIN (but why aren't we looping in that case?) or ECHILD.
I meant EINTR, not EAGAIN. But in general, using waitpid() to collect process status without doing it in a loop is risky.
-- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org
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